| TAP Review Guru Ltd | Information & communication | 2023 |
| Tapete Limited | Administrative & support | 2017 |
| Tapori Hounslow Limited | Hospitality | 2020 |
| Taprobane Ltd | Hospitality | 2025 |
| Taqaddum Property Investments Ltd | Real estate | 2023 |
| Tara Property Company Limited | Construction | 2001 |
| Tara Software Solutions Limited | Administrative & support | 2011 |
| Tara's Brows and Lashes Ltd | Other services | 2026 |
| Tara's Day Care Ltd | Health & social care | 2018 |
| Tara's Totes & Things Limited | Manufacturing | 2026 |
| Tara-Diel Limited | Real estate | 2023 |
| Tarana Productions Limited | Information & communication | 2022 |
| Taranu Ltd | Administrative & support | 2017 |
| Tarawneh Ltd | Education | 2018 |
| Target AV Group Limited | Information & communication | 2026 |
| Target AV Ltd | Administrative & support | 2018 |
| Target Property and Investments Limited | Construction | 1980 |
| Target Recruitment (Cheshire) Limited | Administrative & support | 2018 |
| Tarik Chowdhry Limited | Administrative & support | 2018 |
| Tariq Property Management Ltd | Real estate | 2023 |
| Tarique & Co Ltd | Health & social care | 2022 |
| Tariuc Brickwork Ltd | Construction | 2019 |
| Tarmon Holdings Limited | Financial services | 2025 |
| Tarmon Property Limited | Real estate | 2025 |
| Tart Beer Co. Limited | Wholesale & retail | 2024 |
| TAS Corporations Ltd | Wholesale & retail | 2020 |
| TAS Foods Limited | Hospitality | 2016 |
| Tashfeen Khattak Limited | Health & social care | 2026 |
| Tasi Services Ltd | Administrative & support | 2023 |
| Task Pharma Limited | Professional & scientific | 2021 |
| Taskovski Films Limited | Information & communication | 2003 |
| Tasks Limited | Real estate | 2004 |
| Taste of Lahore (Franchise) Limited | Hospitality | 2015 |
| Taste of Watan Limited | Hospitality | 2023 |
| Tasterover Ltd | Hospitality | 2025 |
| Tasty Foods Niks Ltd | Hospitality | 2015 |
| Tasty KH Limited | Hospitality | 2018 |
| Tasty TOO Limited | Hospitality | 2003 |
| TAT 2 UK Ltd | Other services | 2015 |
| TAT Logistics Ltd | Transport & logistics | 2025 |
| TAT SAT Properties Limited | Real estate | 2016 |
| Tate Global Limited | Construction | 2024 |
| Tatham Place Management Limited | Households | 2001 |
| Tatntoo Ltd | Wholesale & retail | 2021 |
| Tattva Network Limited | Information & communication | 2019 |
| Tattvaira Ltd | Wholesale & retail | 2026 |
| Tatvam Limited | Wholesale & retail | 2024 |
| Taub Consultants Limited | Administrative & support | 2013 |
| Tauras Car Carrier Ltd | Transport & logistics | 2016 |
| TAV Transport Ltd | Transport & logistics | 2016 |
| Tavern Quay RTM Company Ltd | Households | 2019 |
| Tavisa Real Estate Limited | Real estate | 2022 |
| Tavistock & Tavistock Ltd | Construction | 2022 |
| Tavistock (Yiewsley) Management Company Limited | Households | 1986 |
| Tavistock Estates Management Ltd | Hospitality | 2023 |
| Tavistock London Limited | Construction | 2022 |
| Tawakal Telecom Ltd | Other services | 2016 |
| Taxation Services (London) Limited | Professional & scientific | 2006 |
| Taxcount Services Limited | Professional & scientific | 2013 |
| Taxfinity Limited | Professional & scientific | 2024 |
| Taxi Tax | | 1999 |
| Taxwell Ltd | Professional & scientific | 2023 |
| Tayarii Limited | Wholesale & retail | 2017 |
| Tayberry Foods Ltd | Hospitality | 2016 |
| Tayibah London Ltd | Wholesale & retail | 2023 |
| Taylor Advisory Ltd | Professional & scientific | 2019 |
| Taylor Associates (International) Limited | Financial services | 2004 |
| Taylor JF Limited | Real estate | 2020 |
| Taylor Light Co Ltd | Administrative & support | 2006 |
| Taylor Made Surveying Limited | Construction | 2014 |
| Taylor MAY Talent Ltd | Administrative & support | 2023 |
| Taylor Paving Ltd | Construction | 2019 |
| Taylor's CBD Ltd | Wholesale & retail | 2023 |
| Tayross Homes Limited | Construction | 1994 |
| TAZ Khan & Co Ltd | Professional & scientific | 2023 |
| TB & F Investments Limited | Households | 2021 |
| TB Hanger Lane Ltd | Hospitality | 2019 |
| TB Project Construction Ltd | Construction | 2023 |
| TB Surveillance Ltd | Administrative & support | 2025 |
| TBA Properties Limited | Real estate | 1987 |
| TBK Construction Ltd | Construction | 2025 |
| TBM Installations Ltd | Construction | 2024 |
| TBS Madhaan Ltd | Real estate | 2024 |
| TC & a Accountancy Services Ltd | Professional & scientific | 2010 |
| TC Beech Ltd | Arts & recreation | 2012 |
| TC Building Team Ltd | Construction | 2019 |
| TC Clinical Consultancy Limited | Health & social care | 2020 |
| TC Real Estate Advisors Limited | Real estate | 2026 |
| Tcfx Ltd | Financial services | 2022 |
| Tcia Limited | Hospitality | 2019 |
| TD FIX Ltd | Construction | 2025 |
| Tdavid Ltd | Transport & logistics | 2018 |
| TDC Collection Ltd | Wholesale & retail | 2020 |
| TDF Construct Ltd | Construction | 2020 |
| TDJ Limited | Hospitality | 2025 |
| Tdkt Ltd | Information & communication | 2017 |
| Tdpc Limited | Information & communication | 2019 |
| TDS Mart Ltd | Wholesale & retail | 2025 |
| TDS Scaffolding Ltd | Construction | 2024 |
| TDW Industries Limited | Wholesale & retail | 2020 |